Improvement in power-looms



UNITED STATES PATENT OEEIcE.

BARTON H. JENKS AND JOHN SHINN, OF BRIDESBURG, PENNSYLVANIA,

ASSIGNORS TO BARTON H. JENKS.

IMPROVEMENT IN POWER-LOOMS.

Specification forming part of Letters PatentNo. 38,534, dated May 12, 1863.

To all whom it may concern.-

Be it known that we, BARTON H. J ENKs, of Bridgesburg, and JOHN SHINN, of Lexington, county of Philadelphia, and State of Pennsylvania, have invented certain new and useful Improvements in Power-Looms for Weaving Plaids; and we do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in Which- Figure l is a view of the lever B. Fig. 2 is a view of the star cam G. Fig. 3 is a view of the end of the loom having the improvements attached to it.

Similar letters of reference indicate corresponding parts iu the several figures.

We will now describe the construction and arrangement of the parts, that others may be able to make and operate the same.

A ,represents the end of the loom-frame. To this is attached the lever B, which is allowed to work freely on the stud g. The other end of the lever is jointed at D and supported by the spring d. This spring is made suftlciently stron g that it will support the shuttleboxes, which are attached to the lever in the usual manner. The object of this joint is that in case the picker should be caught in the shelves of the box atthe time of the raising of the boxes, the spring d will give, and there will be no dan ger of breaking the box or other parts of the box motion. The dotted lines in Fig. 3 is a fair representation of the operation of the above-described improvement.

O represents a star-cam, of the proper form, for operating three shuttleboxes. Said cam is attached to the loom and operated in the ordinary manner, it being necessary in weaving certain styles of goods to skip the center box or pass directly from the bottom to the top, and from the top to the bottom.

With the star-cam without our improvement it is impossible to give a full rise of the box Without jarring, as the stud p would pass the' center step. Our improvement obviates this difficulty, which improvement consists in constructing said cam in such a manner that the steps a a, a a on the right side of the four rays are of half the thickness of the cam itself, and presenting an inclined surface from the center to the back of the cam, thereby leaving the front of each ray of one curve from bottom to top. The cam C operates the lever B by means of the stud p, on which there should be a roller. This stud is drilled through its center for the pin r, Fig. l. The pin r is attached to the spring s, and is made to work freely through the stud p. As the cam revolves in the direction of the arrow, it will press the stud p, raising the lever B, and in passing the step a the inclined surface will force out the pin r, and as the pin passes the top of the step the spring s'will force itin, and it rests on top of the step supporting the shuttle-boxes when it is not desirable to make a full lift.

This improvement may be so modified as to use an oscillating cam in place of a revolving one.

Having thus described our invention, what we claim as new, and desire secured to us by Letters Patent, is-

l. Making the leverB jointed, as above de scribed, and for the purpose specified.

2. The raising-cam O, in combination with the moving pin r, or its equivalent', for the above-described purpose.

BARTON H. J ENKS. JOHN SHlNN! Witnesses:

PHILIP LERCII, Jr., WILLIAM DoIssoN. 

